... plate, baked varnish surface.* Color: Optional.* Sound system: Internal magnetic Stereo amplifier, 2.2W amplifier board, 8Ω10W ... loudspeaker 2pcs;* Heat output: Internal 12V fans to achieve better ventilation effect.* Power supply: ... Barcodescanner, document scanner,thermal printer, A4 printer, magnetic swipe card reader, inductive IC/ID cardreader,64 or 16bits metal keyboard, ...